Misting of Newtonian Liquids in Forward Roll Coating
DSpace at IIT Bombay
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Title |
Misting of Newtonian Liquids in Forward Roll Coating
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Creator |
OWENS, MS
VINJAMUR, M SCRIVEN, LE MACOSKO, CW |
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Subject |
HIGH-SPEED
INSTABILITY FLUIDS FILMS FLOW |
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Description |
Misting of Newtonian liquids, in the film-split region of two counter rotating rigid and deformable cylinders was visualized with standard and high-speed cameras. Flow instabilities begin with ribbing and eventually lead to generation of air-borne droplets called mist. As speed was raised, a uniform film thickness evolved into one with ribs, which evolved into continuous sheets of liquid extending downstream of the gap between the cylinders. The edge of each sheet formed a rim whose two ends were attached to the ribs on the cylinders. Still images via high-speed photography revealed a new mechanism for mist generation: the sheets extended downstream, became unstable and ruptured to produce air-borne droplets. A droplet time-of-flight measurement technique quantified the effect of process settings (speed and speed ratio) and material properties (viscosity and surface tension) on droplet size, count, and mass concentration of mist.
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Publisher |
AMER CHEMICAL SOC
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Date |
2012-06-26T08:52:14Z
2012-06-26T08:52:14Z 2011 |
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Type |
Article
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Identifier |
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,50(6)3212-3219
0888-5885 http://dx.doi.org/10.1021/ie100747w http://dspace.library.iitb.ac.in/jspui/handle/100/14229 |
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Language |
English
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